not true at all. near the bay our neighborhood is filled with oaks of all kinds - young and old, magnolia groves, massive pines, florida holly as big as magnolia trees, cypress trees, many varieties of bay trees and the list goes on forever of mature native trees and plants. we have lived among them for quite some time in fact. while the forest may not be 100 years old in some places, it is mostly mature and filled with beautiful native trees. (you are talking about state owned forest replanted with pines - these are also beautiful in their own way and filled in with native shrub and plants as well. nature reclaims its space when given time and opportunity. I am grateful for the abundance of state preserved land around here).
as I stated before, over the years many lots were stripped bare of huge oaks, magnolias, cypress and all growing around them. the bay area still has pockets of live oaks that were left alone back in the day.
You know the state purchased the 18,000 plus acres of SoWal when the previous group of owners went bankrupt, and the previous owners purchased it from St. Joe, who were tree farmers. Yes, there are other trees, depending on where you are located, but the bulk of that land was planted pine. The state also picked up a considerable amount of land from private land owners also. It depends on where you live.